Monsters in art gallerys, but not in the books

[Shade]

I haven't seen this happen in awhile, but the wasteland giant from the Sandstorm art gallery isn't in the book.

 

[BOZ]

Dread (Player's Guide to Faerun; rumored to be in Ancient Empires)
Flameskull (Player's Guide to Faerun; rumored to be in Ancient Empires)
Giant Velvet Worm (Player's Guide to Faerun; rumored to be in Ancient Empires)
Gorynych (Player's Guide to Faerun; rumored to be in Ancient Empires)
Ixzan (Player's Guide to Faerun; rumored to be in Ancient Empires)
Metalmaster (Player's Guide to Faerun; rumored to be in Ancient Empires)
Nighthaunt (Player's Guide to Faerun; rumored to be in Ancient Empires)

considering i still haven't gotten Lost Empires of Faerun, how many of these proved to be true?

 

[Shade]

All of 'em are in there. I should update the original post.

 

[Beyond the Grave]

also of note, in Sandstorm, the Crystal Scorpion is mentioned a few times and listed in the CR charts, but does not actually appear anywhere in the book....

 

[Shade]

Updated.